Ax and pick machine



April 9, 1929. J. LUCAS 1,708,391

AX AND PICK MACHINE Original Filed March 26. 1926 4 Sheets-Sheet 1 FIG.3

INVENTDR his a'fforney A ril 9, 1929. J. LUCAS AX AND PICK MACHINEOriginal Filed March 26. 1926 4 Sheets-Sheet FIG. 4

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J. LUCAS AX AND PICK MACHINE Original Filed March 26. 1926 4Sheets-Sheet 4 FIG.

gm mi W In Patented Apr. 9, 1929.

JOHN LUCAS, OF PITTEBURGH,

PENNSYLVANIA, ASSIGNOR TO LEWIS FOUNDRY &

MACHINE COMPANY, OF PiiTSBURGE, PENNSYLVANIA, A CORPORATION OF PENN-SYLVANIA.

AX AND PICK IVIACHINE.

Application filed lvlarch 28, 1926, Serial No. 97,539. Renewed August27, 1928.

This invention relates to a machine for manufacturing ax heads and pickheads.

@ne object he invention is to provide a machine in which the dieholdingmeans may be readily changed to adapt the machine to themanufacture of either a); heads or pick heads.

Another object of the invention is to pro vide a punching or forgingmachine in which two cross heads maybe actuated simultaneously, or whichmay be readily adapted for the actuation of one cross head alone.

Another object of the invention is to provide a die for use in thepunching of pick heads and ax heads which holds the blank on four sidesduring the punching operation. As the dies for punching pick heads or anheads and the dies for forming an heads are not interchangeable in theirholders, the present machine secures its double function by means of aconstruction which renders the die holders themselves interchangeable.'In the accompanying drawings Figure l is an end elevation of the ax andpick machine; Figure 2 is a side elevation of the holder for the upperdies for forming ax heads; Figure 3 is a cross sectional view throughsuch die holder on line 33 Figure 2; Figure 4 is a side elevation of themachine, showing an punching dies in operative position, and showing theholders for ax forming dies; Figure 5 is a side elevation of the holderfor the lower ax forming die; Figure 6 is an end elevation of such dieholder; Figure 7 is a plan view of such die holder; Figure 8 is apartial side elevation of the machine, showing both of its elementsequipped with punching dies adapting it to the manufacture of picks;Figure 9 is a side elevation of the member in which the stock holdingdies are mounted; Figure 10 is a plan view of such die holder; Figure 111s a fragmentary sectional view showing the mounting of the member shownin Figure 9 and Figure 10, with side stock holding dies positionedtherein, and showing a punching die holder with the die mounted therein;Figure 12 is a plan view of the upper punching die holder; Figure 13 isa side elevation of such die holder; and Figure 1 1 is a sectional viewon the line 14-'1 1, Fig. 4, showing the arrangement of the end dies forholding ax stock for punching.

The frame Work of the machine comprises a base 1, a central housing 2,and side hous 3 and 1. Mounted in the base 1 are die supporting tables 5and 6; the die supporting table 5 being disposed between housings 2 and3, and the die supporting tabie-6 between the housings 2 and 4:.Adjacent the upper extremity of the machine is a main shaft 7, which isdivided part way of its length butthe divisions of which may beinterconnected by suitable bolts passing through collars 8. At One endof shaft 7 is loosely mounted a gear 9, which meshes with a pinion 10 ona driving shaft 11. Driving shaft 11 has thereon a pinion l2 meshingwith a pinion 13 on the shaft of an electric motor 1 1. On shaft 11 aremounted two fly-wheels ii and 14 to relieve the motor as the dies punchor form the stock.

A clutch 15 serves to connect gear 9 opcrativoiy with the main shaft 7at the will of the operator of the machine. Clutch 15 is operated bymeans of a bell crank lever 16 connected at the extremity of one of itsarms to the clutch 15, and which is pivoted on a shaft 17 in bracket 18aliixed to base 1. A coiled spring 19 exerts a downward force on thehorizontal arm of bell crank 16, tending to maintain the clutch in itsongaged position to'fixedly connect the gear 9 with the main. shaft 7.

Slidable in guides 20 and 21 are cross heads 22 and 23, which are actedupon respectively by eccentrics 24 and 25 on the main shaft 7. Brakeblocks 26 and 27 are mounted to contact the shaft 7 and operate toretard the motion at all times, so that when the clutch is disengaged onthe upward stroke of the cross heads the motion is soon. stopped.Extending from the cross head 22 is an arm 28 which is also looselymounted on the shaft 17.- A locking pin 29 is mounted in bell crank armat 16 and is normally forced by a coiled spring 30 into a position toengage the top surface of arm 28 which oscillates with movement of crosshead 22.

With locking pin 29 in this position, arm 28 when rising acts to liftthe lower arm 16 of the bell crank and thus throw arm 16 of the bellcrank outwardly and disengages the clutch 15 as the cross head 22approaches the upper limit of its movement.

Adjacent the outer extremity of locking pin 29 is a projection 31, whichlies in an When treadle is depressed, bell crank 33 is oscillated towithdraw locklng pin 29 from its position interengaging the arm 28 andbell crank 16. This permits the clutch to become engagedby the forceexerted by coiled spring '19,'and produces actuation of the cross headsso long as the treadle is main tained' in its depressed position.

.- Theupper punching die holder37 for the punching ofaxes and picks isshown in detail in Figures 12 and 13. This die holder comprises a bodyportion 38 and side guide v portions39. Extending from the body porftionof the die holder is a member 40 for ,the attachment of arm 28, thefunction of which has been previously described. The figuide; portions39 engage in tracks in the housings 2 and 3, and are held in place byguide strips 42 which are removably secured j to the housings by'bolts43.

*44 of the cross head has therein a socket 45 for the reception of apunching die.

The lower face The side, die carriers 46 are pivotally mounted in thelower die holder 47 supported by the table 5. The upper, or head,

. portiOns 46 of the die carriers hold the side dies '48.

wardly' from' the head portions of the dies,

Tail members 46" extend down and have bearing against them coiledsprings49. on a rod '50 which extends between the housings 2 and 3 and 2 and 4.These side die carriers are actuated by a sliding contact with theupper'dieholder37. For this purpose the lower face 44 of the upper dieholder has thereon beveled surfaces 51 arranged to contact beveledsurfaces'52 on the I head portion-of thedie holders. Downward kmovementof the upper die holder thus forces the head portions of bothdiecarriers inwardly, while the force exerted by coiled springs 49 on thetail portions of the die carriers tends to separate the dies upon upwardmovement of the upper die holder.

"As shown in Figure 8, this portion-of the machine is equipped for thepunching of .p ck heads. Asshown in F1gures'4 and 14, however, it isequipped for the punching and forming of ax heads. As shown in these Thedie 54 is carried by a die holder or chuck 57. Die holder 57 has thereona flange 58 which is provided with a beveled surface 59 arranged to becontacted by a beveled extension 60 on a vertically movable arm 61.Downward movement of the arm 61, which is actuated by movement of thecross head 22 and die liolder37, serves to force the die with thepunching operation.

54 inwardly to perform a forming operation on the stock from which theaxhead is made. This operation take place simultaneously Rearwardmovementof the die holder is produced by means ofa flat spring 62,.which engages the die holder 57 and is-secured tolthe base 1 =01? themachine. This spring is placed under tension by inward movement of thedie holder, and exerts a force which causes outward movement-of the dieholder after the arm has moved upwardly therebeyond.

In order to adapt this side of themachine to the punching of pick heads,the bolts 43 are disengaged and the guide strips 42 are removed. Theupper-die holder 37, carry with it the vertical arm 61, can then b:readily removed, permitting the removal of die 54 and die holder 57. Theside dies in members 46 are changed as needed to hold the pick stock.Bracket 55, in which die 53 is mounted, and which may-be secured to thebase of the machine by bolts 59, is also removed; and this leavesthemachine in condition forthe insertion of a substituted upper dieholder. This die holderfor' the punchingof pick heads may be identicalwith that for the punching of. ax heads. Front and rear dies are,however, unnecessary for performing the pick'punching operation, so theyare omitted fromj'the [assembly. v

In Figure 8 the side of the machineis shown equipped with pick punchingdies generally similar to those described" immediately above. The reasonfor two punching dies is because the helve hole infa pick head ispunched by two operations, and the dies for performing these operationsdiffer slightly from each other in sizeand shape.

In Figure 4 the machine is shown provided with ax punching diesandwithholders for the forming dies for'ax heads. This is for the reasonthat 'thelhelve hole forax heads may be punchedby a; single'set of'dies;

and the head formed by va second *set. In

Figure'4 the upper die holder' 63 is shown as-bolted to the-cross head23, and the'lower die holder 64 as centered on the table 5*by means ofpins 65. These die holders are of the simple structure which isdesirablefor holding forming dies.

The cross headj23 and-upper die holder 63 are slidably engaged 'in'tracks '21, and are held in position by'means ofguide'strips 42 securedby bolts 43. These guide'strips also may be readily removed forachange-of-die holders. 7 Y

The changes which adapt the machine to its several purposes are-simplean'd may be expeditiously made. It is economical because the punchingof" the pick heads, and the punching and forming of'the ax heads areoperations which may bequibkly9performed, and the continuous use ofamachine for an extended length of time is unnecessary in a plant ofaverage size.

If the right hand side of the machine is to be used alone for either thepunching or forming of ax heads, the left hand side may be disconnected.This is effected by disconnecting the two sections of shaft 7, and bymounting the gear 69 and pinion 70 on extensions 71 and 72 of main shaft7 and driv- 20 punching die, a pair of opposed holding dies pivotallymounted in said lower punching die, said pivoted holding dies and theupper die holder having co-operating surfaces arranged to force theholding dies toward each other during downward movement of the crosshead, a holding die slidably mounted at right angles to said pivotallymounted dies, and means carried by the upper die holder for actuatingsaid slidable die.

2. A- die structure comprising the combination of a punching die, a pairof opposed holding dies pivotally mounted in said punching die, astationary holding die, and a holding die slidable toward and from saidstationary die, the slidable die being mounted for motion atapproximately right angles to said pivotally mounted dies.

In witness whereof, I hereunto set my hand.

JOHN LUCAS.

